CN115723381A - Paper flattening device and control method thereof - Google Patents

Abstract

The invention belongs to the technical field of paper processing, and particularly relates to a paper flattening device, which comprises: the device comprises a rack, a workbench, two pressing plates, a horizontal driving mechanism and a vertical driving mechanism, wherein the workbench is arranged at the lower part of the rack, and the two pressing plates, the horizontal driving mechanism and the vertical driving mechanism are all arranged above the workbench; the workbench is used for placing paper; the two pressing plates can be driven by the horizontal driving mechanism to approach or separate from each other; the vertical driving mechanism is used for driving the horizontal driving mechanism and the two pressing plates to be close to or far away from the workbench; the paper flattening machine has the effects of flattening the paper with folds and raised corners and reducing the scrappage of the paper.

Description

Paper flattening device and control method thereof

technical field

The invention belongs to the technical field of paper processing, in particular to a paper flattening device and a control method thereof.

Background technique

After the paper is produced and shaped, it needs to be transferred and conveyed many times. In this process, it is easy to cause problems such as paper wrinkles and corners, which will eventually lead to paper scrapping and waste of resources. Therefore, it is necessary to set up a paper flattening device to prevent wrinkles and corners. Flatten the lifted paper.

Contents of the invention

The object of the present invention is to solve the above-mentioned existing technical problems, and provide a paper flattening device and its control method, which can flatten paper with wrinkles and raised corners, and reduce paper scrapping.

In view of this, the present invention provides a paper flattening device, including: a frame, a workbench, two pressing plates, a horizontal drive mechanism, a vertical drive mechanism,

The workbench is set at the lower part of the frame, and the two pressure plates, the horizontal drive mechanism and the vertical drive mechanism are all set above the workbench;

The workbench is used to place paper;

Driven by the horizontal drive mechanism, the two pressing plates can approach or move away from each other;

The vertical drive mechanism is used to drive the horizontal drive mechanism and the two pressing plates to approach or move away from the workbench.

In this technical solution, the paper with wrinkles and raised corners is placed on the upper surface of the workbench, and the vertical drive mechanism drives the pressure plate up and down to realize the flattening of the middle of the paper, and the horizontal drive mechanism drives the two pressure plates in the flattening process. The paper is separated from each other, so that a flattening process is carried out on the paper plane to flatten the folds on the paper, and completely flatten the paper from the middle to the corner, so as to reduce the waste of paper.

In the above technical solution, further, the vertical driving mechanism includes a driving cylinder, the driving cylinder is arranged on the upper part of the frame, and the movable end of the driving cylinder is connected with the horizontal driving mechanism for driving the horizontal driving mechanism to move vertically.

In the above technical solution, further, the horizontal drive mechanism includes:

The main frame body is connected with the vertical drive mechanism;

Horizontal drive gear, the rotation of which is set on the main frame body;

A drive motor, which is arranged on the main frame body and is used to drive the horizontal drive gear to rotate;

The first driving frame is slidably arranged on the main frame body, and a first rack is provided on it, and its lower end is connected with the first pressing plate, and the first rack is engaged with the upper part of the horizontal driving gear;

The second driving frame is slidably arranged on the main frame body, and a second rack is provided on it, the lower end of which is connected with the second pressing plate, and the second rack is meshed and connected with the lower part of the horizontal driving gear;

Wherein, the bottom surfaces of the two pressing plates are at the same height.

In the above technical solution, further, a first guide groove is provided along the horizontal direction on the side wall of the first driving frame, and a first guide rod is provided on the main frame body, and the first guide rod is slidably arranged on the second side along the horizontal direction. in a guide slot.

In the above technical solution, further, the side wall of the second drive frame is provided with a second guide groove along the horizontal direction, the main frame body is provided with a second guide rod, and the second guide rod is slidably arranged on the second guide rod along the horizontal direction. Two guide slots.

In the above technical solution, further, the horizontal driving mechanism further includes a locking mechanism, which can limit the rotation of the horizontal driving gear when the locking mechanism is connected to the first driving frame, and the locking mechanism includes:

The rotating block is arranged on the main frame body and is located above the first driving frame;

The card column is arranged at the lower part of the rotating block;

an arc-shaped slot, which is opened on the upper surface of the first driving frame, and which runs through the two opposite side walls of the first driving frame;

Wherein, during the rotation of the rotating block, the clamping column can be clamped into the arc-shaped clamping groove.

In the above technical solution, further, a torsion spring is provided between the rotating block and the main frame body, and the torsion spring is squeezed when the card column exits the arc-shaped slot.

In order to facilitate the public to better understand the paper flattening device of the present invention, the present invention also discloses a control method suitable for the aforementioned paper flattening device. The control method includes the following steps:

Step 1: Reset the flattening device so that the two pressing plates are at the closest position, and the two pressing plates are far away from the worktable, and at the same time, the clamping column is stuck in the arc-shaped slot to lock the horizontal drive gear;

Step 2: Place the paper on the upper surface of the workbench;

Step 3: Drive the horizontal drive mechanism and the two pressure plates down through the vertical drive mechanism and press the middle of the paper;

Step 4: Turn the rotating block to make the card column withdraw from the arc-shaped slot, and start the drive motor to drive the horizontal drive gear to rotate in the forward direction, and drive the two pressure plates through the cooperation of the horizontal drive gear and the first rack and the second rack While pressing the paper away from each other, the two pressing plates move from the middle of the paper to both sides of the paper to complete the flattening of the paper;

Step 5: Drive the horizontal drive mechanism and the two pressure plates up and away from the workbench through the vertical drive mechanism;

Step 6: Start the drive motor to drive the horizontal drive gear to rotate in reverse, and drive the two pressure plates to approach each other through the cooperation of the horizontal drive gear and the first rack and the second rack. The clamping post will be clamped into the arc-shaped slot under the action of the torsion spring;

Step 7: Remove the flattened paper.

The beneficial effects of the present invention are:

1. Set up two pressing plates to flatten the paper with wrinkles and corners, and the two pressing plates can move horizontally on the paper to dynamically flatten the paper, which has a good wrinkle-removing effect on the paper;

2. By designing the horizontal driving mechanism as a structure of a horizontal driving gear and two driving racks, the two driving racks are meshed with both sides of the horizontal driving gear through two racks, so that two driving racks can be driven by one power source. Driven by the frame, and only need to change the rotation direction of the horizontal drive gear to realize the approach and separation of the two pressure plates, the structure is ingenious, and the maintenance is convenient;

3. One of the drive frames is locked by setting a locking mechanism. Due to the meshing of the rack and pinion, the horizontal drive gear cannot rotate after one drive frame is locked, so as to ensure that the horizontal drive mechanism can be reset every time. The two pressure plates come to the closest position to each other.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is a schematic diagram of the three-dimensional structure of the present invention in the first direction.

Fig. 2 is a schematic diagram of the three-dimensional structure of the present invention in the second direction.

Fig. 3 is a schematic diagram of the front view structure of the present invention.

Fig. 4 is a schematic diagram of the connection structure between the horizontal drive mechanism and the pressing plate in the present invention, in which the two pressing plates are in a state of being close to each other.

Fig. 5 is a schematic diagram of the connection structure between the horizontal drive mechanism and the pressing plate in the present invention, in which the two pressing plates are in a state of being far away from each other.

FIG. 6 is a schematic diagram of a partially enlarged structure at A in FIG. 2 .

The marks in the figure represent:

1-frame, 2-table, 3-pressure plate, 4-horizontal driving mechanism, 401-main frame body, 402-horizontal driving gear, 403-driving motor, 404-first driving frame, 4041-first rack , 405-second drive frame, 4051-second rack, 406-first guide groove, 407-first guide rod, 408-second guide groove, 409-second guide rod, 5-vertical drive mechanism, 6-locking mechanism, 601-rotating block, 602-card post, 603-arc card slot.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

In the description of the present application, it should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. For the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual scale relationship. Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the Authorized Specification. In all examples shown and discussed herein, any specific values should be construed as exemplary only, and not as limitations. Therefore, other examples of the exemplary embodiment may have different values. It should be noted that like numerals and letters denote like items in the following figures, therefore, once an item is defined in one figure, it does not require further discussion in subsequent figures.

It should be noted that the terms "first" and "second" in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application can be practiced in sequences other than those illustrated or described herein, and that references to "first," "second," etc. distinguish Objects are generally of one type, and the number of objects is not limited. For example, there may be one or more first objects.

Example 1

As shown in Figures 1-5, this embodiment provides a paper flattening device, including: a frame 1, a workbench 2, two pressing plates 3, a horizontal driving mechanism 4, and a vertical driving mechanism 5;

Please refer to Figure 1-Figure 2, the frame 1 is a U-shaped body placed at 90 degrees, the workbench 2 is set at the lower part of the frame 1, and the two pressure plates 3, the horizontal drive mechanism 4, and the vertical drive mechanism 5 are all set on the workbench 2 above; the workbench 2 is used to place paper; the two platens 3 can be driven by the horizontal drive mechanism 4 to approach or move away from each other;

In this embodiment, the vertical drive mechanism 5 is mainly used to drive the two pressing plates 3 and the horizontal drive mechanism 4 to move vertically so as to approach or move away from the workbench 2. The vertical drive mechanism 5 can adopt a commonly used drive structure in the art. Such as the cooperation of motor, screw, nut, or screw drive, or other transmission methods, in order to make the structure of the paper flattening device more concrete, in this embodiment, the driving mode of the driving cylinder is taken as an example, and the fixed end of the driving cylinder is installed on the machine. On the top of the frame 1, the movable end of the drive cylinder can move vertically relative to the fixed end, and the movable end of the drive cylinder is connected with the horizontal drive mechanism 4;

In this embodiment, the horizontal driving mechanism 4 is mainly used to drive the two pressing plates 3 to approach each other or to move away from each other. The horizontal driving mechanism 4 can adopt a commonly used driving structure in the field. In order to make the structure of the paper flattening device more concrete, this paper A structure of the horizontal drive mechanism 4 is disclosed in the embodiment,

The horizontal drive mechanism 4 includes: a main frame body 401, a horizontal drive gear 402, a drive motor 403, a first drive frame 404, a first rack 4041, a second drive frame 405, a second rack 4051, and a locking mechanism 6;

Referring to Fig. 2, the main frame body 401 includes a top frame, two side frames, and a backboard, wherein the top frame is connected to the movable end of the drive cylinder; the horizontal drive gear 402 is rotated on the two side frames through the drive shaft; Referring to Fig. 3, the driving motor 403 is arranged on one of the side frames for driving the horizontal driving gear 402 to rotate, and the driving motor 403 is omitted in Fig. 1 and Fig. 2 ;

The first driving frame 404 is L-shaped, and the first driving frame 404 top is a horizontal section, and the bottom is a vertical section. The first driving frame 404 horizontal section is located above the horizontal drive gear 402. The side frame is horizontally slidably connected, the first rack 4041 is installed on the bottom surface of the first drive frame 404 horizontal section, the first rack 4041 is engaged with the upper part of the horizontal drive gear 402, and the lower end of the vertical section of the first drive frame 404 is connected to the bottom surface of the first drive frame 404. A pressing plate 3 is connected, the side wall of the horizontal section of the first driving frame 404 is provided with a first guide groove 406 along the horizontal direction, and the first guide rods 407 are arranged on the two side frames, and the first guide rods 407 can slide along the horizontal direction set in the first guide groove 406;

The second driving frame 405 is also L-shaped, and the second driving frame 405 top is a horizontal section, and the bottom is a vertical section, but the vertical section of the second driving frame 405 is shorter than the vertical section of the first driving frame 404, and the second driving frame 405 is vertical. The horizontal section of the driving frame 405 is located below the horizontal driving gear 402, the horizontal section of the second driving frame 405 is horizontally slidably connected with the two side frames, the second rack 4051 is installed on the upper surface of the horizontal section of the second driving frame 405, and the second tooth The bar 4051 is engaged with the lower part of the horizontal driving gear 402, the lower end of the vertical section of the second driving frame 405 is connected with another pressing plate 3, and the side wall of the horizontal section of the second driving frame 405 is provided with a second guide groove 408 along the horizontal direction , the two side frames are provided with a second guide rod 409, and the second guide rod 409 is slidably arranged in the second guide groove 408 along the horizontal direction;

The two pressing plates 3 have the same structure. Taking one of the pressing plates 3 as an example, the pressing plate 3 is in an inverted T shape as a whole. After being connected with the first driving frame 404 and the second driving frame 405, the bottom surfaces of the two pressing plates 3 are at the same height. At the extreme position where the two pressure plates 3 are close to each other, there is only a small gap between the two pressure plates 3 . actual gap size;

In addition, referring to Fig. 1, a control panel is also arranged on the side wall of the frame 1 to control the work of the horizontal drive mechanism 4 and the vertical drive mechanism 5;

The working principle of the paper flattening device in this embodiment is: place the paper to be flattened on the upper surface of the workbench 2, drive the horizontal drive mechanism 4 and the two pressing plates 3 down to press the middle of the paper by driving the cylinder, and then start The drive motor 403 drives the horizontal drive gear 402 to rotate, and the horizontal drive gear 402 drives the first drive frame 404 and the second drive frame 405 to move away from each other, thereby bringing the two pressure plates 3 to press the paper from the middle of the paper to both sides. Move, flatten the entire paper, and remove wrinkles and warping of the paper.

Example 2

This embodiment provides a paper flattening device, in addition to including the technical solutions of the above embodiments, the horizontal drive mechanism 4 is further limited, as shown in Figures 4-6;

In this embodiment, please refer to FIG. 4 , the horizontal driving mechanism 4 further includes a locking mechanism 6, which can limit the rotation of the horizontal driving gear 402 when the locking mechanism 6 is connected to the first driving frame 404;

The locking mechanism 6 includes: a rotating block 601, a card column 602, and an arc-shaped card slot 603, wherein the middle part of the rotating block 601 is connected to the backboard through a rotating shaft, and the rotating block 601 is located above the first drive frame 404; the card column 602 is located on the The lower part of the rotating block 601, the clamping column 602 can be rotatably connected with the lower part of the rotating block 601, and can also be fixedly connected, please refer to Fig. On the mounting bracket; the arc-shaped slot 603 is provided on the upper surface of the first drive frame 404, the arc-shaped slot 603 runs through the two opposite side walls of the first drive frame 404, and the arc-shaped slot 603 is an arc groove. When the two pressing plates 3 are located at the limit position close to each other, the center of the arc of the arc-shaped slot 603 coincides with the center of the rotating shaft. During the rotation of the rotating block 601, the post 602 can be snapped into the arc-shaped slot 603. At this time, the first drive The frame 404 cannot move to the direction of moving the two pressing plates 3 away from each other. Since the two pressing plates 3 have also reached the limit positions where they are close to each other, the first drive frame 404 cannot move to the direction of moving the two pressing plates 3 close to each other. A driving frame 404 cannot move horizontally;

Since the horizontal drive gear 402 is meshed with the first rack 4041 and the second rack 4051, when the first drive frame 404 cannot move horizontally, the first rack 4041 cannot move horizontally, so the first drive frame 404 will drive the gear horizontally. 402 is locked, and then the second drive frame 405 is also locked;

After flattening the paper, it is necessary to reset the paper flattening device, which includes moving the two pressing plates 3 to the limit positions close to each other. The column 602 snaps into the arc-shaped slot 603 to lock the horizontal drive mechanism 4, ensuring that the two pressing plates 3 can move from the middle of the paper to both sides when the paper flattening device is activated next time;

The rotation of the rotating block 601 can be manually operated or driven by a motor, preferably manually, so that the structural design is simpler, and it can also ensure that the clamping column 602 has been clamped into the arc-shaped clamping groove 603.

Example 3

This embodiment provides a paper flattening device, in addition to including the technical solutions of the above embodiments, the locking mechanism 6 is further limited;

In this embodiment, a torsion spring (not shown in the figure) is set between the rotating block 601 and the back plate. When the position of the opening of the slot 603 is staggered, the elastic force of the torsion spring will make the post 602 close to the upper surface of the first drive frame 404. When the post 602 is opposite to the opening of the arc slot 603, the torsion spring will The elastic force pushes the post 602 into the arc-shaped slot 603 .

Through the design of additional torsion springs, the clamping post 602 can be automatically snapped into the arc-shaped slot 603 , which saves the step of manually pushing in, and the connection between the clamping post 602 and the arc-shaped slot 603 is tighter.

Example 4

This embodiment provides a control method for a paper flattening device, and the control method is applicable to the paper flattening device in the foregoing embodiments;

The control method includes the following steps:

Step 1: Reset the flattening device so that the two pressing plates 3 are located at the nearest position, and the two pressing plates 3 are far away from the workbench 2, and at the same time, the clamping column 602 is stuck in the arc-shaped clamping groove 603 to lock the horizontal driving gear 402;

Step 2: Place the paper on the upper surface of the workbench 2;

Step 3: Drive the horizontal drive mechanism 4 and the two pressing plates 3 down through the vertical drive mechanism 5 and press the middle of the paper;

Step 4: Rotate the rotating block 601 to make the card column 602 withdraw from the arc-shaped slot 603, and start the drive motor 403 to drive the horizontal drive gear 402 to rotate in the forward direction, through the horizontal drive gear 402 and the first rack 4041 and the second gear The cooperation of the bar 4051 drives the two pressure plates 3 to move away from each other while pressing the paper, and the two pressure plates 3 move from the middle of the paper to both sides of the paper to complete the paper flattening;

Step 5: drive the horizontal drive mechanism 4 and the two pressure plates 3 to rise away from the workbench 2 through the vertical drive mechanism 5;

Step 6: Start the driving motor 403 to drive the horizontal driving gear 402 to rotate in reverse, and drive the two pressing plates 3 to approach each other through the cooperation of the horizontal driving gear 402 and the first rack 4041 and the second rack 4051. When the opening of the slot 603 is in contact, the post 602 will snap into the arc-shaped slot 603 under the action of the torsion spring;

Step 7: Remove the flattened paper.

Before placing the wrinkled and warped paper on the workbench 2, you can preheat the paper to improve the flattening effect of the paper. When placing the paper, you need to place the paper on the workbench 2 The position where the upper surface is opposite to the two pressure plates 3 can be provided with a positioning structure or a positioning mark on the upper surface of the workbench 2 to facilitate the positioning of the paper. When the two pressure plates 3 press the paper, they first press the middle of the paper. The force of the pressing plate 3 to press the paper can be adjusted according to the actual operation, and the paper will not be torn during the horizontal movement of the two pressing plates 3; the farthest distance between the two pressing plates 3 can be adjusted to facilitate flattening according to different papers;

Preferably, the two pressing plates 3 are connected to the first driving frame 404 and the second driving frame 405 in a detachable manner, so that pressing plates 3 of different sizes can be replaced according to the actual specifications of the paper to achieve a better flattening effect .

The embodiments of the present application have been described above in conjunction with the accompanying drawings. In the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The specific implementation above is only illustrative, rather than restrictive. Under the inspiration of this application, those skilled in the art can also make Many forms all belong to the protection of this application.

Claims (8)

1. A paper platen comprising: a frame (1), a workbench (2), two pressing plates (3), a horizontal driving mechanism (4) and a vertical driving mechanism (5), which is characterized in that,

the workbench (2) is arranged at the lower part of the rack (1), and the two pressing plates (3), the horizontal driving mechanism (4) and the vertical driving mechanism (5) are arranged above the workbench (2);

the workbench (2) is used for placing paper;

the two pressing plates (3) can be driven by the horizontal driving mechanism (4) to approach or move away from each other;

the vertical driving mechanism (5) is used for driving the horizontal driving mechanism (4) and the two pressing plates (3) to be close to or far away from the workbench (2).

2. A paper flattening apparatus according to claim 1, characterized in that: the vertical driving mechanism (5) comprises a driving cylinder, the driving cylinder is arranged on the upper portion of the rack (1), and the movable end of the driving cylinder is connected with the horizontal driving mechanism (4) and used for driving the horizontal driving mechanism (4) to vertically move.

3. A sheet flattening apparatus according to claim 1 or 2, characterized in that said horizontal drive mechanism (4) comprises:

a main frame body (401) connected to the vertical drive mechanism (5);

a horizontal drive gear (402) rotatably provided on the main frame body (401);

a driving motor (403) which is arranged on the main frame body (401) and is used for driving the horizontal driving gear (402) to rotate;

the first driving frame (404) is arranged on the main frame body (401) in a sliding mode, a first rack (4041) is arranged on the first driving frame, the lower end of the first driving frame is connected with the first pressing plate (3), and the first rack (4041) is meshed and connected with the upper portion of the horizontal driving gear (402);

the second driving frame (405) is arranged on the main frame body (401) in a sliding mode, a second rack (4051) is arranged on the second driving frame, the lower end of the second driving frame is connected with the second pressing plate (3), and the second rack (4051) is meshed with the lower portion of the horizontal driving gear (402);

wherein the bottom surfaces of the two pressing plates (3) are positioned at the same height.

4. The paper flattening apparatus of claim 3, wherein: a first guide groove (406) is formed in the side wall of the first driving frame (404) along the horizontal direction, a first guide rod (407) is arranged on the main frame body (401), and the first guide rod (407) is slidably arranged in the first guide groove (406) along the horizontal direction.

5. The paper flattening apparatus of claim 3, wherein: and a second guide groove (408) is formed in the side wall of the second driving frame (405) along the horizontal direction, a second guide rod (409) is arranged on the main frame body (401), and the second guide rod (409) is slidably arranged in the second guide groove (408) along the horizontal direction.

6. A paper flattening apparatus according to claim 3, characterized in that said horizontal drive mechanism (4) further comprises a lock mechanism (6), said lock mechanism (6) being connected to said first drive frame (404) to restrict rotation of said horizontal drive gear (402), said lock mechanism (6) comprising:

a rotating block (601) which is rotatably arranged on the main frame body (401) and is positioned above the first driving frame (404);

a clamp column (602) arranged at the lower part of the rotating block (601);

the arc-shaped clamping groove (603) is formed in the upper surface of the first driving frame (404) and penetrates through two opposite side walls of the first driving frame (404);

the rotating block (601) can clamp the clamping column (602) into the arc-shaped clamping groove (603) in the rotating process.

7. A paper flattening apparatus according to claim 6, wherein: a torsion spring is arranged between the rotating block (601) and the main frame body (401), and when the clamping column (602) is withdrawn from the arc-shaped clamping groove (603), the torsion spring is extruded.

8. A method of controlling a paper platen, which is adapted for use with the paper platen of claim 7, comprising the steps of:

the method comprises the following steps: the flattening device is reset, the two pressing plates (3) are located at the nearest positions, the two pressing plates (3) are far away from the workbench (2), and meanwhile the clamping columns (602) are clamped in the arc-shaped clamping grooves (603) to lock the horizontal driving gears (402);

step two: placing paper on the upper surface of the workbench (2);

step three: the vertical driving mechanism (5) drives the horizontal driving mechanism (4) and the two pressing plates (3) to descend and press the middle part of the paper;

step four: rotating the rotating block (601) to enable the clamping column (602) to withdraw from the arc-shaped clamping groove (603), starting the driving motor (403) to drive the horizontal driving gear (402) to rotate in the forward direction, driving the two pressing plates (3) to move away from each other while pressing paper through the cooperation of the horizontal driving gear (402) and the first rack (4041) and the second rack (4051), and moving the two pressing plates (3) to the two sides of the paper from the middle of the paper to finish the paper pressing;

step five: the horizontal driving mechanism (4) and the two pressing plates (3) are driven to ascend away from the workbench (2) through the vertical driving mechanism (5);

step six: the driving motor (403) is started to drive the horizontal driving gear (402) to rotate reversely, the horizontal driving gear (402) is matched with the first rack (4041) and the second rack (4051) to drive the two pressing plates (3) to approach each other, and when the clamping column (602) is contacted with the opening of the arc-shaped clamping groove (603), the clamping column (602) can be clamped into the arc-shaped clamping groove (603) under the action of the torsion spring;

step seven: and taking down the flattened paper.

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